Percussive tool.



L. C. BAYLES.

PERCUSSIVE TOOL.

APPLICATION FILED PPB. s, 1912.

1,081,653. l Patented Dec. 16,1913.

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PERCUSSIVE TOOL.

APPLICATION FILED FEB. s, 1912.

Patented Dec. 16, 1913.

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;. sans a'rn err LEWIS C. BAYLES, 0F EASTON, PENNSYLVANIA, ASSIGNOR TOINGERSOLL-RAND COMPANY, OF NEW YORK, N. Y., A CQRPQRATIQN @E JERSEY.

PERCUSSIVE TOOL.

Application tiled. February 3, 1912.

To @ZZ whom t may concern:

Be it known that I, Lnwls C. Berlins, a citizen of the United States,and resident of Easton, in the county of Northampton and State ofFennsylvania, have invented a new and useful Improvement in PercussiveTools, of which the following is a speciiication.

The object of my invention is to provide a percussive tool having anovel form of rotation device, the device being operated independentlyof the work piston.

In the accompanying drawings, Figure 1 represents in longitudinalcentral section a percussive tool of the piston hammer type with myimproved rotation device applied thereto. Fig. 2 is a transverse sectiontaken in the plane of the line Af-A of Fig. 1. F ig. 3 is a transversesection taken in the plane ot the line B-B of Fig. 1. Fig. l is a frontend view of the rotation controlling piston. Fig. 5 is a side view ofthe same, Fig. G is a side view of the rotation controlling ring, Fig. 7is a detail longitudinal central section through the tool in a plane atright angles to Fig. 1, and Fig. 8 is a diagrammatic view showing moreclearly the passages connecting the several parts.

The work piston is denoted by 1 and the chamber in which it reciprocatesby 2. The anvil block is denoted by 3 and the shank of the drill steelby 4. The cylinder in which the w'ork piston 1 and anvil block arelocated is denoted by 5 and the usual handle G may be attached in anysuitable manner at the rear end of said cylinder, a back head 7 beinginterposed between the cylinder and handle. The rotary chuck is denotedby 8, and it is provided with an enlarged bore 9, in which the front endoi" the cylinder 5 eX- tends to form a bearing for said chuck. A. hollowsleeve 10 surrounds the cylinder 5 and is spaced therefrom to form arotation controlling piston chamber 11. The rear end of this sleeve 10engages a circumferential flange 12 on the cylinder 5. The front end ofthis sleeve 10 is engaged by a ring 13 which surrounds the chuck 8. Arotation controlling piston 14 is itted to reciprocate in the chamber11. A rotation controlling ring 15 is rotatably mounted in the bore ofthe hollow sleeve 10, and it has a pawl and ratchet engagement with thechuck Specicaton of Letters Patent.

Patented Dec. 16,1913.

Serial No. 675,289.

8. In the present instance, the chuck 8 is provided with one or morespring-pressed pawls 16 and the bore of the rotation controlling ring 15is provided with an annular series of ratchet teeth arranged to beengaged by the said pawl or pawls 1G.

The annular rotation controlling `piston 14 has an interlocked slidingengagement with the cylinder 5, and with the rotation controlling ring15. In the present instance, the rotation controlling piston has astraight tongue and groove connection 17, y18V, with the cylinder 5 anda spiral tongue and groove connection 19, 20, with the rotationcontrolling ring 15.

A motive fluid controlling valve 21 is mounted to reciprocate in thevalve `chest 22, shown herein as formed integral with the cylinder 5,which valve is arranged to separately control the movements of the workpiston 1 and rotation controlling piston 14, as follows: Motive fluidpassages 23, 24, lead from the front and back ends of the work pistonchamber 2 to the face of the valve 21 and motive iiuid passages 245,`26, lead frpm the front and back ,ends of tlieurotation controllingpiston chamber 11 also to the face of the controlling valve 2.1. Themain me: tive iuid supply port is denoted by 27, and main exhaust portsby 28, 29V. ,Ihe bridge ports 80, 31, in the valve 21, alternately openthe front and back ends of the work piston chamber and the rotationcontrolling piston chamber to the motive fluid supply port 27 andexhaust ports 2S, 29.

From the above description it will be Iseen that a very compact rotationdevice is provided for the tool, said rotation device being operatedfrom the controlling valve independently of the work piston.

While I have shown and described my invention in connection with apercussive tool oit the piston hammer type, I do not wish to be limitedto such a construction but contemplate its use in connection withpercussive tools ot any type.

That I claim is 1. In a percussive tool, a work piston, a chuck, anoscillating rotation controlling ring having a driving connection withthe chuck, a reciprocating annular rotation controlling piston movablelongitudinally of the tool and having a driving connection with saidring and means arranged to control the admission of the motive fluid tothe tivo pistons for operating them.

2. In a percussive tool, a Work piston, a chuck, a reciprocating annularrotation controlling piston having a driving connection with the chuckand movable longitudinally ot the tool and a valve arranged to controlthe admission of the motive fluid to the tWo pistons for operating them.

3. In a percussive tool, a Work piston, a chuck, an oscillating rotationcontrolling ring having a driving connection With the chuck, areciprocating annular rotation con` trolling piston movablelongitudinally of the tool and having a driving connection With thering, and a valve arranged to control the admission of the motive iiuidto the tivo pistons for operating them.

4L. In a percussive tool, a cylinder, a Work piston, a chuck, anoscillating rotation controlling ring having al driving connection withthe chuck, a reciprocating annular rotation controlling piston movablelongitudinally of the tool and having a sliding interlocked connectionwith both said cylinder and said rotation ring and means for operatingsaid pistons.

5. In a percussive tool, a cylinder, a Work piston, a chuck, anoscillating rotation controlling ring having a driving connection withthe chuck7 a reciprocating annular rota' tion controlling piston movablelongitudi' nally oi" the tool and having a spiral tongue and groovesliding connection With the rotation controlling ring and a straighttongue and groove sliding connection with the cylinder and means foroperating the pistons.

6. In a percussive tool, a cylinder, a Work piston, a chuck, anoscillating rotation controlling ring having a driving connection Withthe chuck, a reciprocating annular ro` tation controlling piston movablelongitudinally of the tool and having an interior straight tongue andgroove sliding connect/ion with the cylinder and an exterior spiraltongue and groove sliding connection with the rotation controlling ring,and means for operating said pistons.

7. In a percussive tool, a cylinder, a Work piston, a chuck, an annularrotation controlling piston tted to reciprocate longitudinally of thetool and means connecting the rotation controlling piston with the chuckfor rotating said chuck from said annular piston.

8. In a percussive tool, a cylinder, a Work piston, a chuck, an annularrotation controlling piston fitted to reciprocate longitudinally of thetool, means connecting the rotation controlling piston With the chuckfor rotating said chuck from said annular piston, and means foroperating said pistons.

9. In a percussive tool, a cylinder, a Work piston, a chuck fitted torotate, an annular rotation controlling piston fitted to reciprocatelongitudinally of the tool and substantially concentric With said Workpiston and means connecting the rotation controlling piston With thechuck for converting the reciprocative movements of the rotationcontrolling piston into rotative movement of said chuck.

l0. In a percussive tool, a cylinder, a Work piston, a chuck litted torotate, an annular 'rotation controlling piston fitted to reciprocatelongitudinally of the tool and substantially concentric withv said Workpiston, means connecting the rotation controlling piston With the chuckfor converting the reciprocative movements of the rotation con` trollingpiston into rotative movement ot said chuck, and means for operating thepistons.

' In testimony that I claim the foregoing as my invent-ion I have signedmy name in presence of tivo Witnesses, this first day ot February, 1912.

LEWIS C. BAYLES.

lVitnesses F. GEORGE BARRY, C. S. SUNDGREN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

` Washington. D. G.

